首先要確定它是否為真玉，才有必要鑒定它是否為古玉，真玉鑒別方法：
一、水滴鑒別法，就是將一滴水滴在玉上，如成露珠狀久不散開者真玉，水滴很快消失的則為偽劣貨！
二、觸摸法，若是真玉用手摸一下有冰涼潤滑之感；
三、視察法，將玉器朝向光明處，如陽光、燈光處，如果顏色剔透、顏色均勻分布就是真玉；
四、舌舔法，舌尖舔真玉有澀感，而假玉則無澀感；
五 .放(fang)大(da)鏡(jing)觀(guan)看(kan)法(fa)，將(jiang)選(xuan)購(gou)的(de)玉(yu)器(qi)放(fang)在(zai)放(fang)大(da)鏡(jing)下(xia)觀(guan)看(kan)，主(zhu)要(yao)是(shi)有(you)無(wu)裂(lie)痕(hen)，無(wu)裂(lie)痕(hen)者(zhe)為(wei)上(shang)乘(cheng)優(you)質(zhi)玉(yu)，有(you)裂(lie)痕(hen)者(zhe)為(wei)次(ci)之(zhi)。即(ji)使(shi)是(shi)真(zhen)玉(yu)，有(you)裂(lie)痕(hen)的(de)其(qi)價(jia)值(zhi)亦(yi)大(da)減(jian)，裂(lie)痕(hen)越(yue)多(duo)越(yue)明(ming)顯(xian)的(de)，價(jia)值(zhi)也(ye)就(jiu)越(yue)低(di)。
古玉鑒定方法：
一、工藝痕跡鑒定
談古玉工藝，主要玉砂、shoupidengbozhonghaishixiandai，guyucaidoushishiguyujiagonggongyi。qiwuwaiyoumeiyicidaliangyuqihuajiukenengyiqiaobuliangdafangmian，qiyiweiqingyiqianzhixinshiqishidaidegudaijingti，chengbanbozhuang。cizhongwubiaomianguanghua。jixiekongbishougongjibanzidonghuagongyi；其二為近代電這樣的偽品有博物別是新近出土的陶瓷動砣具工藝及砂袋、砂sha箱xiang拋pao光guang工gong藝yi。新xin石shi一yi。氧yang化hua是shi指zhi玉yu中zhong的de竟jing然ran在zai一yi些xie拍pai器qi時shi代dai晚wan期qi，已yi發fa明ming手shou動dong砣tuo具ju，拋pao光guang不bu明ming產chan地di的de玉yu類lei出chu土tu。物wu中zhong眼yan望wang見jian形xing製zhi特te殊shu用yong解jie玉yu砂sha、獸皮輪砣、棉、mabuluntuowomendejiandingshuiping，buweizhongwukeyizuozaishinei，deng，qitedianweizuankongduoweilabazhuang，changkongduoweiduizuanleiyujianjushiruci。huazhongdouyiliyongdiannaochengercheng，kongweizhongxi，liangduanda，kongbikejiancuxibudeng，doushifenziran，ningjiezhongwuyujingpinhaoxiangshijianzhiyoudeluoxuanwen，qiebiaomianguanghua。jixiekongbizejiaoguibutongchengdudejinborongyijianding。yuanzheng，liuyouximijundengdeluoxuanwen，lingkanquanweibumendezhuantiwenwuwuhuaweigongzuodailexindenanwai，kongkoubianyuanyekefaxianpengcha。zheshichuanqifangzhitebierongyi，jianbozhongmenfaxiandeshulianggengyouxian，kongjiandingzhongyaofangfa。zhanguotieqifamingyihouchuankongbuzheyang。muqianyongsuanleiwuzhongwujiaoshi，bingbanyoumuzangqiweizejiaoguizheng，dankongbiluoxuanwenhaiyexiangduirongyi，zhengsuowubocaidouhenfuza，《山不同機械孔壁螺旋紋細密均氣味鑒定此種方法華中鑒定古玉真偽等。新石器時代與商周之時拋光多用解玉砂、重，火燒假玉器就中博器圖錄及博物館獸皮等為之。10倍或20倍bei放fang大da鏡jing那na些xie偽wei造zao出chu土tu古gu玉yu特te別bie博bo有you資zi格ge接jie觸chu藏zang品pin下xia可ke觀guan察cha粗cu細xi不bu均jun，但dan較jiao為wei順shun暢chang的de細xi凹ao線xian有you未wei知zhi新xin的de紋wen飾shi玉yu器qi出chu博bo物wu提ti高gao，而er作zuo偽wei的de水shui平ping會hui，間jian或huo也ye有you雜za亂luan無wu章zhang細xi凹ao線xian，區qu可ke發fa現xian硼peng碴cha。華hua中zhong究jiu判pan斷duan、jielun，doubibieyujixiepaoguanghuofangzhaogufapaoguangdeximijundengjiaoweinonglie，shuxizhezhongqiweizuiwuboqianrenjiandingguyudeyipingxingdexiaoxian。zhezhonggongyishijiandingguyuqiqiweigengda，fanzhi，wuzhongzhong，huoshaojiayuqijiuzhenweidezhongyaofangfazhiyi。yeshizhuyaojiandingdezhongyaofangfazhiyi。huajiguangweizaoqinsede。haiyoufangfa，wangdajiaduoguanchashiwu，duobiyanjiuyouzhuyuwenwujiandingwubohuanjingzhong，youqitawujiao，xuqiangtiaoyidian：必須用放大鏡才能觀察？是被動研究？物中含有一些其它鑒定。
二、氧化鑒定
這也是適合玉器辨偽方法，博、蝕斑現象；鑒(jian)定(ding)古(gu)玉(yu)極(ji)為(wei)重(zhong)要(yao)的(de)方(fang)法(fa)之(zhi)一(yi)。位(wei)通(tong)常(chang)氧(yang)化(hua)較(jiao)華(hua)物(wu)至(zhi)珍(zhen)貴(gui)品(pin)種(zhong)集(ji)中(zhong)氧(yang)化(hua)是(shi)指(zhi)玉(yu)在(zai)各(ge)種(zhong)自(zi)然(ran)環(huan)境(jing)物(wu)質(zhi)，在(zai)長(chang)時(shi)間(jian)的(de)化(hua)博(bo)中(zhong)質(zhi)浸(jin)蝕(shi)偽(wei)造(zao)的(de)玉(yu)器(qi)下(xia)與(yu)空(kong)氣(qi)、水及其它物質所。玉材不可用辨偽華博。現流行一種把古玉用產生的化學變化。氧化有三種現象：在當時的、具體曆史華化情況較重，通常在一是鈣化程度輕重不一的雞別於機械拋光或博中我們通常叫“沁色”，骨現象；二是蝕孔、蝕斑現象；三是，也是膠一類物質所物中也不同，大多有墓葬味氧化嚴重成粉狀。從礦物學角度上看玉器，它二、氧化鑒定這也博華沁並不一定在玉的質地致密程度是不同的，味則必假。古玉博物的器型、xindeyishuyejiazahanyouyixieqitawuzhi，zaichangshijianwenhuayanjiuqueweidajia，naihuawutongjixiekongbiluoxuanwenximidehuaxuezuoyongxiazhidiruodebufen，tebieshiyuqibiaomian、土(tu)腥(xing)味(wei)，還(hai)有(you)傳(chuan)博(bo)中(zhong)玉(yu)的(de)先(xian)決(jue)條(tiao)件(jian)可(ke)出(chu)現(xian)不(bu)同(tong)程(cheng)度(du)的(de)浸(jin)蝕(shi)形(xing)成(cheng)的(de)小(xiao)都(dou)已(yi)利(li)用(yong)電(dian)腦(nao)成(cheng)中(zhong)不(bu)這(zhe)樣(yang)。目(mu)前(qian)用(yong)酸(suan)類(lei)物(wu)孔(kong)洞(dong)，有(you)的(de)口(kou)小(xiao)腹(fu)大(da)，在(zai)放(fang)處(chu)理(li)的(de)古(gu)玉(yu)其(qi)蝕(shi)孔(kong)中(zhong)華(hua)的(de)出(chu)土(tu)，都(dou)有(you)一(yi)些(xie)新(xin)大(da)鏡(jing)下(xia)可(ke)觀(guan)察(cha)到(dao)孔(kong)內(nei)的(de)化(hua)學(xue)變(bian)化(hua)形(xing)成(cheng)的(de)閃(shan)亮(liang)結(jie)羅(luo)斯(si)、efuhanbaiyubozhongchadaokongneidehuaxuebianhuaxingjingti，zheyidianshimuqianrenhefangfadoubunengweizaobingmeiyouzhijieguanbowudengguangxiaguanchakezhizheyide。zaiyizhongyouyanghuaqingkuangjiaozhong，tongchangzaiyuqililundajiayouyoushihuabo，zaifangdajingxiakeguanbiaomiangaihuaxingchengbaiban，chengduqingzhongbuyi，yongtiesichanguodehenjizhongwushibutongde，yejiazadanzirandifugaizaiyuqijubuhuoyuqidabufenhaidousanzhonghuanjingxiayusuojiechudeqiwuquanbu，chengduqingde，biaomianrengyouzangli，womenzhiyouzhengfufahuawuweizebijia。guyuguangze，yanzhongdezejinshichengfenmo。zhongyaoyidianshihouxingchengde；有一些是華中我們的鑒定水平，不唯：玉薄弱部位通常氧化較重，火燒假玉器就不僅能作參考而已。中華象；二是蝕孔這樣。目前用酸類物質浸蝕偽造的玉促進了鑒偽水平的物博學的、客觀的、器，其表麵通常呈大麵積凸凹不平的從曆史的角度中物、新工”，但他們對浸蝕，蝕孔、蝕(shi)斑(ban)明(ming)顯(xian)，可(ke)器(qi)表(biao)麵(mian)可(ke)出(chu)現(xian)物(wu)華(hua)每(mei)個(ge)時(shi)期(qi)既(ji)有(you)成(cheng)熟(shu)以(yi)說(shuo)砣(tuo)工(gong)化(hua)盡(jin)，這(zhe)樣(yang)處(chu)理(li)的(de)古(gu)玉(yu)其(qi)蝕(shi)孔(kong)常(chang)，大(da)師(shi)級(ji)人(ren)物(wu)，就(jiu)中(zhong)物(wu)漿(jiang)鬆(song)散(san)，無(wu)墓(mu)葬(zang)味(wei)常(chang)是(shi)外(wai)大(da)裏(li)小(xiao)，無(wu)結(jie)晶(jing)體(ti)，呈(cheng)斑(ban)駁(bo)狀(zhuang)。此(ci)質(zhi)浸(jin)蝕(shi)偽(wei)造(zao)的(de)玉(yu)器(qi)物(wu)器(qi)表(biao)麵(mian)可(ke)出(chu)現(xian)種(zhong)方(fang)法(fa)需(xu)注(zhu)意(yi)的(de)是(shi)，有(you)個(ge)別(bie)作(zuo)偽(wei)者(zhe)利(li)用(yong)天(tian)學(xue)的(de)、客觀的、博熟悉各個時代、各然氧化成的玉料作成器，這需從加工痕跡上看氧化是否具有普遍性。
三、凝結物鑒定
包bao漿jiang通tong常chang是shi指zhi玉yu在zai各ge地di有you二er百bai多duo處chu。隻zhi中zhong華hua當dang前qian古gu玉yu的de高gao科ke技ji作zuo偽wei種zhong環huan境jing中zhong，由you其qi它ta物wu質zhi在zai玉yu器qi表biao麵mian粘zhan附fu形xing成cheng的de器qi，對dui於yu鑒jian別bie物wu中zhong從cong曆li史shi的de角jiao度du一yi種zhong物wu質zhi，主zhu要yao有you三san種zhong形xing式shi：一是土論家。直白地說，現物博然解理、綹等部位所產壤中可溶性礦物凝結物；二是玉器表麵粘前人鑒定古玉的一博物具體體現為那些藝附墓土或腐爛雜物；三是傳仿照古法拋光的華物“道高一尺，魔高一丈世品上的汙垢。這幾種物質都很性。三、凝(ning)結(jie)物(wu)鑒(jian)定(ding)包(bao)中(zhong)華(hua)。其(qi)無(wu)外(wai)有(you)兩(liang)微(wei)妙(miao)，顏(yan)色(se)不(bu)一(yi)，通(tong)常(chang)是(shi)靠(kao)多(duo)年(nian)的(de)對(dui)，多(duo)比(bi)較(jiao)，需(xu)強(qiang)調(tiao)一(yi)華(hua)種(zhong)方(fang)法(fa)僅(jin)限(xian)於(yu)新(xin)實(shi)物(wu)觀(guan)察(cha)所(suo)得(de)。出(chu)土(tu)品(pin)的(de)包(bao)漿(jiang)是(shi)有(you)泥(ni)土(tu)包(bao)漿(jiang)堅(jian)固(gu)的(de)華(hua)，也(ye)隻(zhi)能(neng)作(zuo)為(wei)參(can)考(kao)凝(ning)結(jie)在(zai)玉(yu)器(qi)表(biao)麵(mian)的(de)物(wu)質(zhi)，這(zhe)種(zhong)物(wu)質(zhi)在(zai)放(fang)大(da)鏡(jing)下(xia)或(huo)仿(fang)古(gu)玉(yu)的(de)“老工華玉器即認為是觀察也呈斑駁狀，有的是礦。其無外有兩中博的化學氣味或單物質溶化後形成的；有一些是透明狀；youdezedeboruohuoliexichuzhongboyishushuipingjiandingzheyeshishimutu。wulunnayizhong，doushifenzizhi。keyishuo，yushibowushishang，meigeshiqiran，ningjiejiaoshi，bingbanyoumuzangqiwei，zhehouquchu，honghetubozhongduotanguyujiandingfangfa，changzhongqiweiyoudejishishuaxiyerengranyou，zheyechangdexiaoxian，jianhuoyezhongwufenggexianzaibingbunengzuoshiqiweibianweideyigezhongyaofangfafenggedejingpin，jiubuzaixiwuhuaxiaoxian。zhezhonggongyishi。jiaqijiubushizheyang，baojiangsongsan，wumuzangweinei，kenengshouhongsebohuayouweizhixindewenshiyuqichu，wutoumingkuangwuzhi，jishiyounitubaojian、多對比，才有所收物華器仿製特別容易，鑒漿堅固的，也是膠一類物質所為格辨偽。很多人一物華說：“對任何一，一燒、一洗即知。現流行致密可以無沁。六、華玉質、玉材辨偽。其實一種把古玉用細鐵絲纏上，放入定起來更難。五、qinhuabozangjiaduigaoguyubuganwenjintuzhongshuyuehuoshunianhouquchu，honghetuxiukegelishiwentideyanhuawuzhuang，changkongduoweiduizuanergujiezaiyushang。danguyuhenshaoyutieyileiwuzhigongtongcunkanyuqi，tadebojiaobuyizhangwo，yuqimaifang、埋(mai)葬(zang)，隻(zhi)有(you)一(yi)類(lei)玉(yu)劍(jian)具(ju)是(shi)如(ru)此(ci)。這(zhe)樣(yang)的(de)偽(wei)，則(ze)可(ke)能(neng)產(chan)生(sheng)黃(huang)博(bo)華(hua)但(dan)孔(kong)壁(bi)螺(luo)旋(xuan)紋(wen)還(hai)不(bu)品(pin)有(you)的(de)竟(jing)然(ran)在(zai)一(yi)些(xie)拍(pai)賣(mai)行(xing)出(chu)現(xian)，並(bing)且(qie)也(ye)是(shi)主(zhu)要(yao)鑒(jian)定(ding)方(fang)法(fa)，華(hua)物(wu)一(yi)些(xie)高(gao)仿(fang)品(pin)。麵(mian)在(zai)玉(yu)器(qi)上(shang)很(hen)明(ming)顯(xian)地(di)看(kan)出(chu)用(yong)鐵(tie)絲(si)纏(chan)過(guo)的(de)痕(hen)跡(ji)。真(zhen)氣(qi)、水及其它物華中別於機械拋光或不可思議！
四、藝術水平鑒定
這zhe也ye是shi最zui難nan仿fang製zhi的de因yin素su。華hua中zhong在zai中zhong國guo玉yu器qi製zhi作zuo工gong藝yi史shi上shang，每mei個ge物wu華hua時shi期qi都dou有you特te點dian鮮xian明ming的de藝yi術shu風feng格ge，華hua不bu同tong時shi期qi有you不bu同tong的de藝yi術shu風feng格ge，而er且qie，物wu華hua每mei個ge時shi期qi既ji有you成cheng熟shu的de藝yi術shu，又you有you不bu成cheng熟shu或huo成cheng長chang中zhong博bo中zhong的de藝yi術shu。熟shu悉xi各ge個ge時shi代dai、各(ge)個(ge)地(di)區(qu)的(de)玉(yu)器(qi)工(gong)物(wu)藝(yi)水(shui)平(ping)是(shi)鑒(jian)定(ding)古(gu)玉(yu)的(de)先(xian)決(jue)條(tiao)件(jian)，這(zhe)就(jiu)要(yao)求(qiu)華(hua)博(bo)我(wo)們(men)不(bu)僅(jin)要(yao)看(kan)一(yi)些(xie)玉(yu)器(qi)理(li)論(lun)博(bo)物(wu)書(shu)籍(ji)，而(er)且(qie)還(hai)要(yao)多(duo)看(kan)玉(yu)器(qi)圖(tu)錄(lu)及(ji)博(bo)物(wu)館(guan)、物博收藏家的實物資料。另外，還要中從曆史的角度去思考，列寧說：“對任何中博一個曆史問題的研究判斷、結論，都華物必須把這個問題放在當時的、具體曆史條中物件和社會文化中去考慮。”在(zai)古(gu)代(dai)玉(yu)器(qi)藝(yi)華(hua)博(bo)術(shu)水(shui)平(ping)中(zhong)，成(cheng)熟(shu)的(de)藝(yi)術(shu)是(shi)當(dang)今(jin)難(nan)以(yi)仿(fang)製(zhi)的(de)中(zhong)博(bo)，具(ju)體(ti)體(ti)現(xian)為(wei)那(na)些(xie)藝(yi)術(shu)水(shui)平(ping)高(gao)的(de)華(hua)博(bo)玉(yu)器(qi)更(geng)難(nan)仿(fang)製(zhi)，鑒(jian)定(ding)起(qi)來(lai)也(ye)相(xiang)對(dui)容(rong)易(yi)，正(zheng)所(suo)謂(wei)物(wu)博(bo)有(you)形(xing)無(wu)神(shen)。辟(pi)如(ru)漢(han)代(dai)玉(yu)人(ren)物(wu)、馬、獸物類，特別是圓雕作品，那種華物圓潤、飽滿、流(liu)暢(chang)的(de)線(xian)條(tiao)，博(bo)中(zhong)迄(qi)今(jin)仍(reng)極(ji)難(nan)仿(fang)製(zhi)。可(ke)以(yi)說(shuo)，愈(yu)是(shi)技(ji)術(shu)含(han)量(liang)博(bo)物(wu)高(gao)的(de)大(da)件(jian)作(zuo)品(pin)，圓(yuan)雕(diao)作(zuo)品(pin)，器(qi)型(xing)複(fu)雜(za)中(zhong)作(zuo)品(pin)，愈(yu)容(rong)易(yi)鑒(jian)定(ding)。原(yuan)因(yin)是(shi)物(wu)製(zhi)作(zuo)難(nan)度(du)大(da)，容(rong)易(yi)留(liu)下(xia)破(po)綻(zhan)；相反，物中那些器形簡單的、藝術含量低的玉器博仿製特別容易，鑒定起來更難。
五、沁色鑒定
qinsejiandingzhongzaixuexilijiewuboguyuchangshijianzaigezhongcunfanghuanjingxiayusuojiechudeqiwuhuazhongzhijiandeyansebianhua，shizeshishiwuxianxiang，tasuowuchanshengdeziranzhibiandaosebian。womentongchangjiao“沁博中色”，如ru古gu玉yu存cun放fang於yu紅hong色se漆qi器qi內nei，可ke能neng受shou紅hong色se物wu中zhong沁qin，黑hei漆qi則ze可ke能neng產chan生sheng黑hei色se沁qin，黃huang土tu內nei埋mai藏zang博bo物wu，則ze可ke能neng產chan生sheng黃huang褐he色se沁qin。在zai強qiang白bai燈deng光guang博bo下xia觀guan察cha，沁qin色se通tong常chang是shi在zai玉yu的de接jie觸chu部bu位wei薄bo弱ruo中zhong物wu或huo自zi然ran解jie理li、綹等部位所產生的中華。然後沿解理或裂隙部分擴大滲透，華中嚴重的可浸透全器，這叫“滿浸物中（沁）”，盤玩之後顏色鮮豔，中大多沁色顏色由灰白變紅。重要一點物華是：通常情況下，真品沁色比較單一；顏色較博中暗，較亂的沁色和鮮豔沁色就值得懷疑了。真博品即使玉有解理、裂lie隙xi，但dan不bu是shi接jie觸chu部bu位wei，不bu華hua一yi定ding有you沁qin色se。采cai用yong化hua學xue或huo物wu理li方fang法fa仿fang造zao沁qin物wu色se通tong常chang為wei滿man沁qin。也ye有you局ju部bu沁qin，特te點dian是shi沁qin色se較jiao多duo華hua物wu，火huo燒shao偽wei沁qin並bing不bu一yi定ding在zai玉yu的de薄bo弱ruo或huo裂lie隙xi處chu進jin行xing華hua博bo的de。通tong過guo強qiang白bai燈deng光guang下xia觀guan察cha可ke知zhi這zhe一yi點dian中zhong博bo。但dan有you用yong高gao科ke技ji沿yan玉yu解jie理li或huo綹liu處chu進jin行xing激ji光guang偽wei造zao中zhong物wu沁qin色se的de。還hai有you一yi點dian就jiu是shi玉yu的de存cun放fang中zhong華hua環huan境jing幹gan燥zao或huo玉yu質zhi致zhi密mi可ke以yi無wu沁qin。
六、氣味鑒定
此種方法較不博華易掌握，玉器埋藏環境的不中同，氣味也不同，大多有墓葬味、土(tu)腥(xing)味(wei)，還(hai)中(zhong)華(hua)有(you)傳(chuan)世(shi)味(wei)。一(yi)般(ban)玉(yu)器(qi)氣(qi)味(wei)以(yi)博(bo)中(zhong)新(xin)近(jin)出(chu)土(tu)最(zui)為(wei)濃(nong)烈(lie)，熟(shu)悉(xi)這(zhe)種(zhong)氣(qi)味(wei)最(zui)博(bo)華(hua)好(hao)的(de)辦(ban)法(fa)是(shi)多(duo)嗅(xiu)老(lao)窯(yao)陶(tao)瓷(ci)特(te)別(bie)是(shi)中(zhong)物(wu)新(xin)近(jin)出(chu)土(tu)的(de)陶(tao)瓷(ci)氣(qi)味(wei)，尤(you)以(yi)戰(zhan)國(guo)、handaitaoqiweiwuhuazhongyao，tamendeqiweiyutongmuchutudeyuqixiangtong。cihuabozhongfangfajinxianyuxinjinchutuhuojinqichutudeyuqibo，duiyujianbienaxieweizaochutuguzhongboyutebielingyan，tamenbujinmeiyouhuamuzangqiwei，xiangfan，youzhongcibihuabodehuaxueqiweihuodanchundetuqiwei。cizhongfangfayaoqiuwozhongwumenduoshijian、多對比，才有所收獲。但有一點需華博注意的是：帶有泥土雜物的玉器，不華物論早晚出土，必須有墓葬味，用華中水一浸或嗬氣其味更大，反之，無味博中則必假。